Caoutchouc-like substance and process of making same.



UNITED STATES PATENT OFFICE.

rm HQFIANN, GAIL WUTELLE, KONRAD DELBBU'GK, AND KURT MEISENBUDG O1 WELD, GEBIANY, ASSIGNOIS TO FAIBENFABBIKEN VORH. FRIEDB. BAYER & 00., OF ELBEBFELD, GERMANY, A CORPORATION OF GERIANY.

OAOUTCHOUG-LIKE SUBSTANCE AND PROCESS OF MAKING SAME.

1,062,828. 1. Drawing.

Specification of Letters Patent. .ap imnoii filed 1min 20, 1011. Serial 80. 615,007.

Patented May 27, 1913.

vented new and useful Improvements in New Caoutchouc-Like Substances and Processes of MakingSame, of which the follow-' in is a specification. I

our earlier applications Ser. Nos.

578,607, 594,557, 578,608 and 588,173 the dimethylbutadiene is production of caoutchouc like substances- 1s described, which may replace natural caoutchouc in its chemical and.technical application. The processes for their produotion consist in converting into caoutchouc like substances methylerythrenes, erythrene and homologues thereof in which at least 2 atoms of H are substituted by methyl groups, such as ditrior tetramethylbuta- It has now been found that by using mixtures of the starting materials mentioned in the above application (erythrene and its substitution products) new caoutchouc-like substances can be advantageously produced with properties different from those of the 'caoutchouc-like substances above referred to. Caoutchouc-like substances can be thus produced of a composite nature, made up of the polymerization products of the mixtures of erythrene hydrocarbons, and containing such products in most intimate intermixture. A more nearly homogeneous product and a more intimate intermixture can thus be produced by mixing the hydrocarbons before or during .the olymerization reactionthan is possible y mixing the individual and lsolated caoutchoucs already formed.

In order to illustrate the new process more fully the following example is given, the parts being by weight :-A mixture of 100 parts of isoprene, 100 parts of cooled erythrene and 100 parts of beta-gammaheated for 3 months in an autoclave to 7075 C. A very tough and elastic substance is thus obtained made up of the caoutchouc-like substance together with any remaining unchanged hydrocarbons and byproducts. By treatment of this substance with steam such hydrocarbons and volatile byproducts, if present, can be removed and the caoutchouc-hke' substance obtained. The process proceeds in an analogous manner on using agents promotmg the polymerization e. 'g. aclds or acid salts, etc.

The new caoutchouc substances are white substances the color of which does not change. They swell u with chloroform or benzene to white hyaline substances from which the liquid can be poured off. They are free from protein substances, which are always contained in the natural caoutchouc and play an important part in it with regard to the elasticity of the natural caoutchouc. They form ozonids being thick oils, nitrosites and brom addition products. These ozonids, nitrosites and brom addition products differ with the different composite caoutchouc products, and correspond to these different products, and indirectly to the particular mixtures' of hydrocarbons of which the composite caoutchoucs are polymerization products. Thus the product produced as above described-from a mixture of erythrene, isoprene and betaammadimethylerythrene forms an ozoni or a mixture of ozonids which upon decomposition with water yields a mixture of oxygen-con taining derivatives among which succinic aldehyde, lavulinic aldehyde, and acetonyl acetone are found.

1. The process of producing acaoutchouclike substance which comprises polymerizing a mixture of more than two erythrene hydrooarbons.

2. The process of producing a caoutchouclike substance which comprises polymerizing a mixture of erythrene hydrocarbons including erythrene and a plurality of othererythrene hydrocarbons.

3. The process of producing a caoutchouclike substance which comprises polymerizing a mixture of erythrene hydrocarbons including isoprene and a plurality of other erythrene hydrocarbons.

4. The process of producing a caoutchouclike substance which comprises polymerizing a mixture of erythrene hydrocarbons including diisopropenyl and a plurality of other erythrene hydrocarbons.

5. The process of producing a caoutchoucpolymerization product of a mixture of more polymerization than two erythrene hydrocarbons.

As a new product a caoutchouc-like substance comprising the caoutchouc-like polymerization product of a mixture of erythrene hydrocarbons including erythrene and a plurality of other erythrene hydrocarbons which product forms a nitrosite, ozonid, and brom-addition product, the ozonid upon decomposition with water yielding succinic aldehyde, and a plurality of other oxygen-containing decomposition products.

9. As a new product a caoutchouc-like substance comprising the caoutchouc-like product of a mixture of erythrene hydrocarbons including isoprene and .4 a plurality of other erythrene hydrocarbons,

which product forms a nitrosite, ozonid and brom-addition product, the ozonid upon decomposition wlth water yielding lavulinic aldehyde and a plurality of other oxygencontaining decomposition products.

10. As a new product a caoutchouc-like substance comprising the caoutchouc-like polymerization product of a mixture of erythrene hydrocarbons including diisopropenyl and a plurality of other erythrene hydrocarbgns which product forms a. nitrosite, ozoni and brom-addition product, the ozonid upon decomposition with water yielding acetonyl-acetone and a plurality of other oxygen-containing decomposition products.

11. As a new product a caoutchouc-like substance comprising the caoutchouc-like polymerization product of a mixture of erythrene hydrocarbons including unsubstituted-, mono-methyl-, and poly-methyl-erythrenes which product forms a nitrosite, ozonid, and brom-addition product, the ozonid upon decomposition with water yielding succinic aldehyde and a plurality of other methyl-substituted derivatives of sucoinic aldehyde.

12. As a new product the caoutchouc-like polymerization product of a mixture of erythrene, isoprene and beta-gamma-dimethylerythrene which product forms a nitrosite, ozonid and brom-addition product, the ozonid upon. decomposition with water yielding a mixture of oxygen-containin derivatives including succinic aldehyde, avulinic aldehyde and acetonyl-acetone,substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

FRITZ HOFMANN. [n s.] CARL COUTELLEl, [L. s.] KON RAD DELBRUCK. [It s.] KURT MEISENBURG. [L.s.] Witnesses:

ALFRED HENKEL, A. Poem. 

